Highly mobile carriers in a candidate of quasi-two-dimensional topological semimetal AuTe2Br

We report the crystal and electronic structures of a noncentrosymmetric quasi-two-dimensional (2D) candidate of topological semimetal AuTe2Br. The Fermi surface of this layered compound consists of 2D-like, topological trivial electron and nontrivial hole pockets, which host a Dirac cone along the k...

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Veröffentlicht in:APL materials 2019-10, Vol.7 (10), p.101110-101110-9
Hauptverfasser: Wang, Zeji, Cheng, Shuyu, Chang, Tay-Rong, Ma, Wenlong, Xu, Xitong, Zhou, Huibin, Wang, Guangqiang, Gui, Xin, Zhu, Haipeng, Zhu, Zhen, Zheng, Hao, Jia, Jinfeng, Wang, Junfeng, Xie, Weiwei, Jia, Shuang
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Sprache:eng
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Zusammenfassung:We report the crystal and electronic structures of a noncentrosymmetric quasi-two-dimensional (2D) candidate of topological semimetal AuTe2Br. The Fermi surface of this layered compound consists of 2D-like, topological trivial electron and nontrivial hole pockets, which host a Dirac cone along the kz direction. Our transport measurements on the single crystals show highly anisotropic, compensated low-density electrons and holes, both of which exhibit ultrahigh mobility at a level of 105 cm2 V−1 s−1 at low temperature. The highly mobile, compensated carriers lead a nonsaturated, parabolic magnetoresistance as large as 3 × 105 in single-crystalline AuTe2Br in a magnetic field up to 58 T.
ISSN:2166-532X
2166-532X
DOI:10.1063/1.5121751